RBP: 00007f74785e41d0 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd44ef32af R14: 00007f74785e4300 R15: 0000000000022000
Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177]
CPU: 0 UID: 0 PID: 5666 Comm: syz-executor.5 Not tainted 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 7f 56 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff888049d6fdc8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000b266000
RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174
RBP: ffff88800974fa90 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ed57 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88801891a41c R14: ffffffff85cfdf20 R15: ffff88804aa7a438
FS: 00007f8a495da700(0000) GS:ffff8880e538f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564a3dcf9548 CR3: 0000000017660000 CR4: 0000000000350ef0
Call Trace:
create_new_namespaces+0x585/0x750
unshare_nsproxy_namespaces+0xc0/0x200
ksys_unshare+0x468/0xa10
__x64_sys_unshare+0x31/0x40
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8a4c085b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8a495da188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f8a4c199020 RCX: 00007f8a4c085b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004a000080
RBP: 00007f8a4c0dff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcdf5a283f R14: 00007f8a495da300 R15: 0000000000022000
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 7f 56 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff888049d6fdc8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000b266000
RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174
RBP: ffff88800974fa90 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8664ed57 R11: 0000000000000001 R12: fffffffffffffffc
R13: ffff88801891a41c R14: ffffffff85cfdf20 R15: ffff88804aa7a438
FS: 00007f8a495da700(0000) GS:ffff8880e538f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564a3dcf9548 CR3: 0000000017660000 CR4: 0000000000350ef0
mac80211_hwsim hwsim13 wlan0: entered promiscuous mode
mac80211_hwsim hwsim13 wlan0: left promiscuous mode
loop3: detected capacity change from 0 to 4
EXT4-fs (loop3): VFS: Can't find ext4 filesystem
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 UID: 0 PID: 5690 Comm: syz-executor.4 Tainted: G D 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
kmem_cache_alloc_noprof+0x80/0x690
getname_flags.part.0+0x48/0x540
getname_flags+0x95/0xe0
user_path_at+0x27/0x90
__x64_sys_mount+0x1fb/0x310
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f747b06eb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74785e4188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f747b181f60 RCX: 00007f747b06eb19
RDX: 0000000020000200 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 00007f74785e41d0 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd44ef32af R14: 00007f74785e4300 R15: 0000000000022000
mac80211_hwsim hwsim13 wlan0: entered promiscuous mode
mac80211_hwsim hwsim13 wlan0: left promiscuous mode
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5696 Comm: syz-executor.0 Tainted: G D 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
strncpy_from_user+0x3b/0x2f0
getname_flags.part.0+0x8d/0x540
getname_flags+0x95/0xe0
user_path_at+0x27/0x90
__x64_sys_mount+0x1fb/0x310
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f41013bdb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f40fe933188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f41014d0f60 RCX: 00007f41013bdb19
RDX: 0000000020000200 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 00007f40fe9331d0 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc42477c3f R14: 00007f40fe933300 R15: 0000000000022000
loop3: detected capacity change from 0 to 4
EXT4-fs (loop3): VFS: Can't find ext4 filesystem
mac80211_hwsim hwsim13 wlan0: entered promiscuous mode
mac80211_hwsim hwsim13 wlan0: left promiscuous mode
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 5709 Comm: syz-executor.0 Tainted: G D 6.18.0-rc5-next-20251114 #1 PREEMPT(voluntary)
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
should_failslab+0xc2/0x120
__kmalloc_cache_noprof+0x81/0x6b0
alloc_fs_context+0x57/0xb20
path_mount+0xd8d/0x2140
__x64_sys_mount+0x293/0x310
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f41013bdb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f40fe933188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f41014d0f60 RCX: 00007f41013bdb19
RDX: 0000000020000200 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 00007f40fe9331d0 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffc42477c3f R14: 00007f40fe933300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 02 00 add (%rax),%al
2: 00 4c 8b 65 add %cl,0x65(%rbx,%rcx,4)
6: 28 4d 85 sub %cl,-0x7b(%rbp)
9: e4 74 in $0x74,%al
b: 43 e8 7f 56 30 00 rex.XB callq 0x305690
11: 49 8d bc 24 78 01 00 lea 0x178(%r12),%rdi
18: 00
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 f7 02 00 00 jne 0x32b
34: 49 8b 9c 24 78 01 00 mov 0x178(%r12),%rbx
3b: 00
3c: bf .byte 0xbf
3d: 08 00 or %al,(%rax)